Fortunately i bought a Crucial M550 256Gb SSD, placed as the first drive (with a 3.5>2.5 adapter) going to full SATA2, and replaced the SuperDrive with a 2,5" HDD! I know... SATA2 it's not so fast, but it's faster than ever, so when i'll replace this mac with a hackintosh ( obviously :P) i can...